[PATCH v1 04/14] spi: pxa2xx: Replace header inclusions by forward declarations

[Andy Shevchenko <andriy.shevchenko@linux.intel.com>]

When the data structure is only referred by pointer, compiler may not need
to see the contents of the data type. Thus, we may replace header inclusions
by respective forward declarations. Due to above add missed headers as well.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 drivers/spi/spi-pxa2xx-dma.c   |  6 ++++--
 drivers/spi/spi-pxa2xx.c       |  2 ++
 drivers/spi/spi-pxa2xx.h       | 18 ++++++++++--------
 include/linux/spi/pxa2xx_spi.h |  2 ++
 4 files changed, 18 insertions(+), 10 deletions(-)

diff --git a/drivers/spi/spi-pxa2xx-dma.c b/drivers/spi/spi-pxa2xx-dma.c
index 2e4a49567146..32ab7391396d 100644
--- a/drivers/spi/spi-pxa2xx-dma.c
+++ b/drivers/spi/spi-pxa2xx-dma.c
@@ -9,11 +9,13 @@
 #include <linux/device.h>
 #include <linux/dma-mapping.h>
 #include <linux/dmaengine.h>
-#include <linux/pxa2xx_ssp.h>
 #include <linux/scatterlist.h>
 #include <linux/sizes.h>
-#include <linux/spi/spi.h>
+
 #include <linux/spi/pxa2xx_spi.h>
+#include <linux/spi/spi.h>
+
+#include <linux/pxa2xx_ssp.h>
 
 #include "spi-pxa2xx.h"
 
diff --git a/drivers/spi/spi-pxa2xx.c b/drivers/spi/spi-pxa2xx.c
index e9dddcbd92f1..0296cbdee848 100644
--- a/drivers/spi/spi-pxa2xx.c
+++ b/drivers/spi/spi-pxa2xx.c
@@ -9,6 +9,7 @@
 #include <linux/clk.h>
 #include <linux/delay.h>
 #include <linux/device.h>
+#include <linux/dmaengine.h>
 #include <linux/err.h>
 #include <linux/errno.h>
 #include <linux/gpio/consumer.h>
@@ -25,6 +26,7 @@
 #include <linux/pm_runtime.h>
 #include <linux/property.h>
 #include <linux/slab.h>
+
 #include <linux/spi/pxa2xx_spi.h>
 #include <linux/spi/spi.h>
 
diff --git a/drivers/spi/spi-pxa2xx.h b/drivers/spi/spi-pxa2xx.h
index 6724d7e056ce..739e264feaa6 100644
--- a/drivers/spi/spi-pxa2xx.h
+++ b/drivers/spi/spi-pxa2xx.h
@@ -7,16 +7,18 @@
 #ifndef SPI_PXA2XX_H
 #define SPI_PXA2XX_H
 
-#include <linux/atomic.h>
-#include <linux/dmaengine.h>
-#include <linux/errno.h>
-#include <linux/io.h>
 #include <linux/interrupt.h>
-#include <linux/pxa2xx_ssp.h>
-#include <linux/scatterlist.h>
+#include <linux/io.h>
+#include <linux/types.h>
 #include <linux/sizes.h>
-#include <linux/spi/spi.h>
-#include <linux/spi/pxa2xx_spi.h>
+
+#include <linux/pxa2xx_ssp.h>
+
+struct gpio_desc;
+struct pxa2xx_spi_controller;
+struct spi_controller;
+struct spi_device;
+struct spi_transfer;
 
 struct driver_data {
 	/* SSP Info */
diff --git a/include/linux/spi/pxa2xx_spi.h b/include/linux/spi/pxa2xx_spi.h
index 31f00c7f4f59..1e0e2f136319 100644
--- a/include/linux/spi/pxa2xx_spi.h
+++ b/include/linux/spi/pxa2xx_spi.h
@@ -5,6 +5,8 @@
 #ifndef __linux_pxa2xx_spi_h
 #define __linux_pxa2xx_spi_h
 
+#include <linux/types.h>
+
 #include <linux/pxa2xx_ssp.h>
 
 #define PXA2XX_CS_ASSERT (0x01)
-- 
2.30.2